FONTAINE. | THE EMMONS COLLECTION, 305 
linear in form, with apparently subacute tips. The texture was thick 
and leathery. The maximum length of the leaves is 4 cm. and the 
maximum width, which occurs near their bases, 4 mm. They narrow 
gradually toward their tips and more suddenly at their bases, which 
are elliptical in form. They are apparently attached by a very short, 
twisted petiole. The midnerve is rather slender but distinct, and it is 
continued to the top of the leaf. 
Family PINACEA. 
Genus PALISSYA Endlicher. 
PaLissyA SPHENOLEPIS (Friedrich Braun) Brongniart. ! 
Pl. XLIV; Pl. XLV, Fig. 1. 
Emmons gives, in American Geology, Pt. VI, pp. 105, 106, pl. iva., 
figs. 72, 78, a description of a plant which he calls Walchia longifolius, 
saying that it is common at Lockville. There are in his collection a 
number of specimens, including apparently the original of pl. iva, but 
not those of figs. 72and 73. If, however, that is the original of pl. iva, 
it does not show so much of the plant as is given in this plate. Pos- 
sibly it may have been broken since it was drawn. In Mon. U. S. 
Geol. Survey, Vol. VI, p. 107, I stated that I thought that this plant 
is Palissya Braunii. A study of the specimen confirms me in that 
opinion. The plant was evidently, as Emmons states, common. The 
largest impression of it is that given in Fig. 1 of Pl. XLIV, which is 
the supposed original of Emmons’s pl. iva. It shows a principal stem 
to which a penultimate twig is attached on the right-hand side. ‘There 
are several large penultimate twigs, so placed on this side that they 
would unite with the principal stem if it were prolonged lower down. 
On the left-hand side there is a stout twig of penultimate order that 
apparently once joined the main stem lower down. The smaller stems 
are more or less thickly clothed with leaves. Most of the leaves, how- 
ever, which were present when the fragment was entombed have dis- 
appeared. The appearance ef the fossil indicates that the main stem 
and its branches were all thickly clothed with leaves of the same char- 
acter. The larger stems are represented mainly by their imprints, but 
in some places a portion of the woody matter remains, which some- 
times carries leaves on its sides. The leaves are distichous in the 
plane of cleavage of the rock. They vary slightly in dimensions and 
shape. The longest are 15 mm. long and 1 mm. wide in their widest 
portion, which is at the base. Some, however, are 5 mm. shorter, and 
some are rather wider and tend to an elliptical form. Perhaps some 
of these variations are due to distortion. The normal leaves are thin 
1¥For synonymy, see supra, p. 249. 
20 GEOL, PT 2——20 
